Feed-water heater.



No.761,67o; EATENTEDJUNE?,1904.v

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EEED WATER HEATER.

APPLICATION FILED JAN. 28, 1904.

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Attorney w UNITED STATES Patented June 7, 1904.

vPATENT OFFICE.

FEED-WATER HEATER.

SPECIFICATION forming part of Letters Patent No. 761,670, dated June 7, 1904, Application filed January 28, 1904. Serial No. 191,000. (No model.)

To all whom t may concern:

Be it known that I, PETER GRAssMANN, a citizen of the United States,residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful f Improvements in Stoker Fire-Doors and Feed- Water Heaters; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an improved stoker fire-door and feed-water heater for steam-boiler and other furnaces, the object of my invention be-l ing to provide a fire-door Which is exceedingly A strengthen the construction of the door. The

K pipe 15.

lower portion of the front wall is rearwardly inclined, as at 5, and provided with a handhole 6 and adischarge-opening 7 The latter is screw-threaded and fitted with a screw-threaded discharge-plug 8. A plate 9 forms a closure for the hand-hole and is detachably secured in place by a yoke 10 and bolt 11.

In the top of theAre-door is a stufng-box 12, through which extends the vertical lower end of va water-supply pipe 13, which enters the upper portion ,of lthe iire-door and is provided with a valve 14 t0 control the supply of water to the chamber formed by the hollow fire-door. A water-discharge pipe 15 leads from the upper side of the fire-door to a tank 16 or other suitable receptacle. An adjusting-holt 17 supports the upper portion of the The latter is attached to and movable vertically with the fire-door, the bolt 17 permitting such movement of the pipe by moving freely in an opening in a iange which projects from the tank. The nut on the bolt should be so set as to bear on said flange when the fire-door and the pipe 15 are lowered.

The re door operates between vertical guideways 18, each of which has at its upper end a bracket 19,secured thereto by a bolt 20.

The fire-door may be raised and'lowered by screws 21, which pass through openings in the brackets and are provided with nuts 22, that bear on the upper sides'of the brackets. By the provision of the hollow re-door the same is adapted to receive water Y and to heat the same prior to its delivery into the boiler, thereby enabling the otherwise Waste heat to be utilized in heating the feed-water. Moreover, this construction of the fire-door very greatly prolongs the life thereof, as the water which is maintained in circulation therein prevents the {ire-door from being so rapidly burned out. i

From the foregoing description, taken in v connection with the accompanying drawings, the construction and operation of the lnvention will be readily understoodwithout requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, isp 1. In combination with a vertically-movable hollow fire-door forming a feed-water heater, iiow and return pipes connected thereto, guide- Ways between which the fire-door operates, brackets attached to said guideways, and screws, connecting the brackets and hre-door, and adapted to raise and lower the latter.

2. In combination with a vertically-movable hollow fire-door forming a feed-water heater, a pipe communicating therewith, and-a packing element for the-pipe, the latter being relatively fixed.

3. In combination with a vertically-movable hollow fire-door forming e feed-Waterheater, a supply-pipe therefor, with relation to which the fire-door is movable, and a return-pipe movable with the fire-door.

4. In combination with a vertically-movable hollow lire-door forming` a feed-Water heater, a supply-pipe therefor, with relation to which the fire-door is movable@ return-pipe movable with the [ire-door, and :L receptacle into which the return-pipe discharges. IO

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

PETER GRASSh/IANN. Witnesses JACOB GROSS, BALDWIN KREMER. 

